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Slow Web connection with Web Protection enabled


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  • Root Admin

Thank you @gicahagi

If you have not setup extensive exclusions between Malwarebytes and Kaspersky then yes you probably will have some issues. As for the Web Protection you'll need to either choose ours or the one from Kaspersky.
Don't believe you'll be able to use both of them at the same time.

Since you're using Kaspersky and they do have a known compatibility issue with almost every known security software I would believe that is more than likely your issue.

Here are some generic links on setting exclusions but you may need more in depth assistance to setup proper exclusions with Kaspersky

Malwarebytes for Windows antivirus exclusions list

Video: Add Exclusions in Malwarebytes for Windows v4

Patch A for version
Patch A for Kaspersky Internet Security version was released on August 11, 2020.


Here are links from Kaspersky which pretty much says in a nutshell that if you choose their product then you need to remove all other security products.


How to change Application Control settings

You can see here from a previous topic that there have been known issues with Kaspersky. Even if you are successful in getting them to work well together now a change from Kaspersky, Malwarebytes, or even Windows can once again cause issues.

Kaspersky 2020 g update released



List of applications incompatible with Kaspersky Internet Security


If you use Kaspersky Internet Security alongside incompatible applications, the applications may not work properly and and operating system errors may occur. We recommend removing these applications before the installation of Kaspersky Internet Security.



List of applications incompatible with Kaspersky Internet Security

  • 360 Antivirus Software
  • Acer LANScope Agent
  • Adaptive Security Analyzer
  • Ad-Aware Web Companion
  • AEC TrustPort Antivirus
  • AEC TrustPort Personal Firewall
  • AES Encryption Module
  • Agnitum Outpost Antivirus Pro
  • Agnitum Outpost Firewall
  • Agnitum Outpost Firewall Pro
  • Agnitum Outpost Network Security Client
  • Agnitum Outpost Security Suite Pro
  • Agnitum Spam Terrier
  • AhnLab SpyZero
  • AhnLab Internet Security
  • AhnLab Internet Security Platinum Enterprise
  • AhnLab VirusBlock
  • AhnLab VirusBlock Internet Security
  • Aluria Security Center
  • AIYac Antivirus
  • ArcaVir Antivir
  • ArcaVir Internet Security
  • Ashampoo AntiSpyware
  • Ashampoo AntiVirus
  • Ashampoo FireWall PRO
  • Authentium Command Anti-Malware
  • Authentium Command AV
  • Authentium Safe Central
  • Avast Free Antivirus
  • Avast Internet Security
  • Avast Premier
  • Avast Pro Antivirus
  • Avast Software
  • avast! Antivirus Software
  • avast! Free Antivirus
  • avast! Internet Security
  • avast! Pro Antivirus / Premier
  • ALWIL Software Avast
  • AVG AntiVirus
  • AVG Anti-Virus FREE
  • AVG Internet Security
  • AVG Free
  • AVG Free Edition
  • AVG Identity Protection
  • AVG Protection
  • AVG Software
  • Avira Antivirus
  • Avira AntiVir Personal - Free Antivirus 
  • Avira AntiVir Personal - Avira Professional Security
  • Avira AntiVir PersonalEdition Classic
  • Avira AntiVir PersonalEdition Premium
  • Avira AntiVir Premium
  • Avira AntiVir Professional
  • Avira AntiVir Server/Desktop
  • Avira Antivirus Premium
  • Avira Connect
  • Avira Endpoint Security
  • Avira AntiVir Windows 7 Workstation
  • Avira Free Antivirus
  • Avira Antivirus Suite
  • Avira Family Protection Suite
  • Avira Internet Security Suite
  • Avira Premium Security Suite
  • Avira Internet Security
  • Avira Launcher
  • Avira Management Console Agent
  • Avira Professional Security Management agent
  • Avira Professional Security
  • Avira Server Security (generic)
  • Avira Software
  • Avira WebProtector
  • Baidu Antivirus
  • Baidu Cleaner
  • Baidu PC Faster
  • BitDefender
  • BitDefender Antivirus Pro
  • BitDefender Internet Security
  • Bit Defender Professional Edition
  • BitDefender Total Security 
  • BitDefender  Professional
  • BitDefender  Professional Plus
  • BitDefender  Standard
  • BitDefender Antivirus
  • BitDefender Antivirus Plus
  • BitDefender Business Client
  • BitDefender Client Professional Plus
  • BitDefender DeploymentTool Agent
  • BitDefender for FileServers
  • BitDefender Free Edition
  • BitDefender Management Agent
  • BitDefender Security for Windows Servers
  • BitDefender Standard Edition
  • Bitdefender Windows 8 Security
  • BullGuard
  • BullGuard AntiVirus
  • CA AntiVirus
  • CA Anti-Virus Plus
  • CA Anti-Virus CA eTrustITM Agent
  • CA eTrust Antivirus
  • CA eTrust InoculateIT
  • CA eTrust ITM 
  • CA eTrust iGateWay
  • CA eTrust Pestpatrol
  • CA eTrust PestPatrol Anti-Spyware
  • CA eTrust PestPatrol Anti-Spyware Corporate Edition
  • CA eTrust Suite Personal
  • CA Personal Firewall
  • CA eTrustITM Agent
  • CA HIPS Managed Client
  • CA Licensing
  • CA PC Security Suite
  • CA Private PC Security Suite
  • CA Total Defense R12 Client
  • Check Point Endpoint Security
  • Cipafilter Client Tools
  • Cisco Security Agent
  • ClamAV
  • ClamAV gredAV
  • ClamWin Antivirus
  • ClamWin Free Antivirus
  • Command Anti-Malware for Enterprise
  • Command AntiVirus for Windows
  • Command AntiVirus for Windows Enterprise
  • Comodo AntiSpam
  • COMODO Antivirus
  • Comodo Antivirus Advanced
  • Comodo Firewall
  • Comodo Internet Security Premium
  • Comodo Internet Security Pro
  • Comodo Internet Security Complete
  • Comodo BOClean
  • COMODO Antivirus
  • Comodo Safe Surf
  • COMODO Firewall
  • COMODO IS Premium
  • COMODO Firewall Pro
  • Comodo Internet Security
  • Comodo Antivirus
  • COMODO Internet Security Premium
  • COMODO Internet Security Pro
  • COMODO Antivirus Advanced
  • Comodo Software
  • CyberDefender Early Detection Center
  • CyberDefender Link Patrol
  • DrVirus
  • Dr.Web Anti-virus for Windows
  • Dr.Web AntiVirus
  • Dr.Web Anti-Virus for Windows Pro
  • Dr.Web AntiVirus for Windows Servers
  • Dr.Web CommuniGate Plugin
  • Dr.Web Enterprise Agent
  • Dr.Web Enterprise Serve
  • Dr.Web Enterprise Server
  • Dr.Web Security Space
  • Dr.Web Security Space Pro
  • DrWeb Enterprise Client
  • DrWeb for Windows
  • EarthLink Protection Center
  • EarthLink Protection Control Center
  • eConceal Firewall Standard for Windows
  • eEye Digital Security Blink
  • Emsisoft Anti-Malware
  • eScan Anti-Virus (AV) for Windows
  • eScan Anti-Virus Edition
  • eScan Anti-Virus for SMB
  • eScan Corporate for Windows
  • eScan IIS for SMB
  • eScan Internet Security Suite 9
  • eScan Virus Control (VC) Edition for Windows
  • ESET Antivirus German
  • ESET Antivirus Rus
  • ESET Antivirus Software English
  • Eset Endpoint Antivirus
  • ESET Endpoint Antivirus Kazakh
  • ESET Endpoint Antivirus Russian
  • ESET Endpoint Security Kazakh
  • ESET Internet Security Kazakh
  • ESET Internet Security russian
  • ESET Internet Security  English
  • ESET NOD32 Antivirus  Russian
  • ESET NOD32 Antivirus Kazakh
  • ESET NOD32 Antivirus  English
  • ESET NOD32 Antivirus
  • ESET NOD32 Antivirus Spanish
  • ESET NOD32 Antivirus Brazil
  • ESET NOD32 Antivirus Business
  • ESET NOD32 ESET Smart Security
  • Eset NOD32 for Windows
  • ESET NOD32
  • ESET Remote Administrator Console
  • ESET Remote Administrator Server
  • ESET Smart Security English
  • ESET Smart Security Kazakh
  • ESET Smart Security Russian
  • ESET Smart Security Spanish
  • ESET Smart Security
  • ESET Smart Security Ger
  • eTrust Anti-Spam
  • eTrust Antivirus
  • eTrust EZ Antivirus
  • eTrust EZ Firewall
  • eTrust Personal Firewall
  • FFRI Proactive Security
  • Filseclab Personal Firewall
  • FortiClient
  • F-PROT Antivirus
  • F-PROT Antivirus for Windows
  • F-Prot for Windows
  • F-Secure Cincinnati Bell IS
  • F-Secure Anti-Virus / STREAM Antivirus / F-Secure Antivirus for workstation
  • F-Secure Anti-Virus for Windows Servers
  • F-Secure Anti-Virus for Workstations - Virus & Spy Protection
  • F-Secure Anti-Virus for Workstations
  • F-Secure Anti-Virus for Workstations + DeepGuard
  • F-Secure Client Security
  • F-Secure Client Security - Virus & Spy Protection
  • F-Secure Internet Security
  • F-Secure SAFE
  • F-Secure SAFE Internet Security
  • G DATA AntiVirus
  • G DATA Software AntiVirenKit
  • G Data AntiVirus
  • G DATA AntiVirus Client
  • G DATA Internet Security
  • G DATA AntiVirusKit
  • G DATA Total Care
  • G Data Total Protection
  • G DATA TotalCare
  • G Data TotalProtection
  • Grisoft AVG
  • Grisoft AVG Free
  • Grisoft AVG LinkScanner®
  • Grisoft AVG / Steganos Internet Security  / Steganos Antivirus
  • HitmanPro.Alert
  • iHateSpam for Microsoft Outlook
  • Ikarus virus utilities
  • InfoWatch CryptoStorage
  • Installer for User Profile Hive Cleanup Service
  • Integrity Flex
  • IObit Security 360
  • Iolo Personal Firewall
  • Iolo Antivirus
  • Jiangmin Antivirus KV2008
  • JiangMin Antivirus Software
  • JUST Internet Security
  • K7 Anti-Virus Premium
  • K7AntiVirus
  • K7TotalSecurity
  • Kaspersky Anti-Hacker
  • Kaspersky Anti-Spam Personal
  • Kaspersky AntiViral Toolkit Pro
  • Kaspersky Anti-Virus
  • Kaspersky Anti-Virus for Windows File Servers
  • Kaspersky Anti-Virus for Windows Workstation
  • Kaspersky Anti-Ransomware Tool for Business
  • Kaspersky Anti-Virus Lite
  • Kaspersky Anti-Virus Personal
  • Kaspersky Anti-Virus Personal Pro
  • Kaspersky Crypto Storage
  • Kaspersky Endpoint Security
  • Kaspersky Fraud Prevention
  • Kaspersky Free Anti-Virus
  • Kaspersky Security Cloud
  • Kaspersky Small Office Security PC/FS
  • Kaspersky Total Security
  • KC Softwares SUMo
  • Kerio Personal Firewall
  • Kerio WinRoute Firewall
  • KINGSOFT Internet Security
  • Kingsoft AntiSpyware
  • Kingsoft AntiVirus
  • Kingsoft Internet Security  plus
  • Kingsoft Internet Security U
  • Kingsoft System Defender
  • KingsoftSecurityCare
  • KLFLTDEV Upper Filter
  • KPN Internet Veiligheidspakket
  • KPN Veilig
  • Lamantine Sticky Password
  • LANDesk Antivirus 8
  • Lavasoft Personal Firewall
  • Lavasoft Anti-Virus Helix
  • Lavasoft Web Companion
  • Lightspeed Security Agent
  • Look 'n' Stop
  • Look'n'stop Firewall
  • Malwarebytes
  • McAfee Agent (generic)
  • McAfee Agent
  • McAfee Alert Manager
  • McAfee AntiSpyware Enterprise
  • McAfee Anti-Spyware Enterprise Module
  • McAfee Antivirus Software
  • McAfee Desktop Firewall
  • McAfee Firewall
  • McAfee Firewall Protection Service
  • McAfee Host Intrusion Prevention
  • McAfee SpamKiller
  • McAfee VirusScan Professional Bonus Pack
  • McAfee McAfee Security Scan Plus
  • America Online Antivirus (Powered by McAfee)
  • McAfee Personal Firewall Plus
  • McAfee Security Center
  • McAfee Site Advisor
  • McAfee SiteAdvisor Enterprise Plus
  • McAfee Total Protection
  • McAfee Virus and Spyware Protection Service
  • McAfee Virus Scan Enterprise
  • McAfee VirusScan
  • McAfee VirusScan Enterprise
  • McAfee VirusScan Home Edition
  • Microsoft AntiSpyware
  • Microsoft Forefront Client Security Antimalware Service
  • Microsoft Forefront Client Security State Assessment Service
  • Microsoft Forefront Server Security
  • Microsoft Security Client
  • Microsoft Security Essentials
  • Microsoft Windows Live OneCare
  • MS Security Essentials / Forefront EP 2-4 / MS System Center EP
  • NANO AntiVirus
  • NAVER Anti-virus
  • Nifty Security24 Assistant Tools
  • Nifty Security24
  • Norman Endpoint Protection
  • Norman Personal Firewall
  • Norman Virus Control
  • Nortel Networks Contivity VPN Client
  • Norton AntiVirus 5 for Windows NT Workstation
  • Norton AntiVirus Corporate Edition
  • Norman Endpoint Protection Stand Alone
  • Norman Security Suite
  • Norton Antivirus Software
  • Norton Security
  • Norton 360
  • Norton AntiVirus
  • Norton AntiVirus Professional Edition
  • Norton Confidential
  • Norton Internet Security
  • Norton Internet Security Professional
  • nProtect Antivirus/Antispyware
  • nProtect Personal
  • Online Armor Panda Cloud Antivirus
  • Orange AntiVirus Firewall
  • Orange Launch pad
  • Orbit Downloader
  • Panda AdminSecure 
  • Panda Antivirus
  • Panda Antivirus Pro
  • Panda CLient Shield
  • Panda Security for Desktops
  • Panda Dome
  • Panda Endpoint Protection
  • Panda Free Antivirus
  • Panda Global Protection
  • Panda Gold Protection
  • Panda Internet Security 
  • Panda IS  for Netbooks
  • Panda Platinum Internet Security
  • Panda Security for File Servers
  • Panda WebAdmin AntiVirus
  • Password Manager XP
  • PC Safe - 2345
  • PC Tools Firewall Plus
  • PC Tools AntiVirus
  • PC Tools Spyware Doctor 
  • PC Tools Internet Security
  • PC-cillin AntiVirus
  • PeoplePC Internet Security
  • PeoplePC Internet Security Pack
  • PeoplePC EarthLink Protection Center
  • PeoplePC Internet Security Pack
  • Prevx
  • PrivateFirewall
  • Quick Heal AntiVirus Plus
  • Quick Heal Total Security
  • RAV AntiVirus
  • Rising AntiVirus
  • Rising Antivirus  Virus Killer
  • Rising Internet Security
  • Rising Personal Firewall
  • Securitoo AntiVirus Firewall
  • Sophos Antivirus
  • Sophos Anti-Virus
  • Sophos Safeguard
  • Sophos AutoUpdate
  • Sophos Endpoint Security and Control
  • Sophos Enterprise Console
  • Sophos NAC Application Server
  • Sourcenext ZERO Super Security
  • Sourcenext ZERO Super Security Agent
  • Spam Monitor
  • Spybot - Search & Destroy
  • StarForce SafenSec
  • StarForce SafenSec Pro
  • Steganos Internet Anonym Pro
  • Subelt iHate Spam
  • Sunbelt iHate Spam for Outlook
  • Sunbelt Personal Firewall
  • Sunbelt VIPRE
  • Sunbelt VIPRE Antivirus and Antispyware
  • Sunbelt Kerio Personal Firewall
  • SUPERAntiSpyware Free Edition
  • Super Security ZERO 
  • Sygate Personal Firewall
  • Symantec AntiVirus
  • Symantec AntiVirus german
  • Symantec AntiVirus Corporate Edition
  • Symantec Norton 360
  • Symantec Norton 360 Beta
  • Symantec Norton Internet Security 2008
  • Symantec Client Firewall
  • Symantec Client Antivirus
  • Symantec Client Security
  • Symantec Endpoint Protection
  • Symantec Endpoint Protection  FR
  • Symantec Endpoint Protection Brazil
  • Symantec Endpoint Protection italy
  • Symantec Endpoint Protection Eng
  • Symantec Endpoint Protection DE
  • Symantec Norton AntiVirusProfessional
  • Symantec Norton AntiVirus
  • Symantec Norton Internet Security
  • Symantec Protection Agent
  • Symantec.cloud - Cloud Agent
  • AtGuard
  • TEGAM International ViGUARD
  • Tiny Firewall Pro
  • Tiny Personal Firewall
  • Tremd Micro Security Server
  • Trend Micro Anti-Spyware
  • Trend Micro Antivirus+
  • Trend Micro Browser Guard
  • Trend Micro Damage Cleanup Services
  • Trend Micro Deep Security Notifier 
  • Trend Micro Endpoint Application Control
  • Trend Micro Internet Security
  • Trend Micro Internet Security (Pro)
  • Trend Micro Maximum Security
  • Trend Micro OfficeScan Client
  • Trend Micro OfficeScan Server
  • Trend Micro PC-cillin AntiSpam Pilot
  • Trend Micro PC-cillin Internet Security
  • Trend Micro ServerProtect
  • Trend Micro Anti-Spyware for SMB / Enterprise
  • Trend Micro Client/Server Security Agent
  • Trend Micro Titanium
  • Trend Micro Titanium Antivirus Plus
  • Trend Micro Titanium Internet Security
  • Trend Micro Titanium Maximum Security
  • Trend Micro Worry-Free Business Security Agent
  • Trustport Antivirus 
  • Trustport Internet Security 
  • Trustport Total Protection
  • Update for Windows
  • V3 Lite
  • Vexira Antivirus CMS
  • Vexira Antivirus for Windows Servers
  • Vexira Antivirus Professional
  • Vexira Antivirus prof
  • Vexira/VirusBuster Antivirus Professional
  • ViPNet Office Firewall
  • ViPNet Personal Firewall
  • VIPRE Advanced Security
  • VIPRE Antivirus 
  • VIPRE GFI Business Agent
  • VIPRE Internet Security
  • ViRobot Desktop
  • ViRobot Desktop ISMS
  • ViRobot ISMS Client
  • ViRobot Windows Server
  • Virus Block ADA
  • Virus Buster Internet Security
  • Virus Chaser
  • VirusBlokAda AntiVirus
  • Virus Dr.
  • Virus Security
  • Virus Security ZERO
  • VirusBuster Personal
  • VirusBuster prof
  • VirusBuster Professional
  • VIRUSfighter
  • Webroot AntiSpyware Client
  • Webroot Internet Security Essentials
  • Webroot AntiVirus
  • Webroot AntiSpyware
  • Webroot SecureAnywhere
  • Webroot Desktop Firewall
  • Webroot Software
  • Windows Live OneCare
  • Zillya Antivirus
  • Zillya! Antivirus
  • Zillya! Internet Security
  • Zondex Guard
  • Zone Labs IMsecure
  • ZoneAlarm Antivirus
  • ZoneAlarm Free Antivirus + Firewall
  • ZoneAlarm Free Firewall
  • ZoneAlarm Anti-Spyware
  • ZoneAlarm Firewall
  • ZoneAlarm Firewall Pro
  • ZoneAlarm Internet Security Suite
  • ZoneAlarm Security Suite
  • ZoneAlarm Wireless Security
  • ZoneAlarm with Antivirus
  • ウイルスバスター クラウド
  • クラウドセキュリティ ZERO




Kaspersky statement on Kaspersky Protection Extension not recommended in Mozilla FireFox web browser

How to disable promotional messages in Kaspersky Lab products


Thank you






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  • Root Admin

It is not a bug. It is an ongoing compatibility issue. Running more than one antivirus application at a time has always been problematic.

The choice is yours. Malwarebytes works very well with Windows Defender that is built-in to Windows 10 if you want to uninstall Kaspersky.

If you want to keep Kaspersky then you need to either spend a lot of time trying get them to play together well, or uninstall Malwarebytes.

Again, the choice is really up to you and how much time or effort you want to put into it.


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I would also add that I have seen numerous issues with network connectivity and speed when using multiple WFP drivers such as the one used by Malwarebytes for its Web Protection component and I believe Kaspersky uses at least one WFP driver for its firewall and web filtering components as well which might explain the issues you are experiencing.  If this is the case, exclusions might help, but more than likely you will need to disable one of the WFP drivers (this also explains why disabling Web Protection resolves the issue since doing so disables Malwarebytes' WFP driver).  I've seen users with similar issues using Avast, Bitdefender and a few other AVs.  Sometimes exclusions help, sometimes they do not and one of the WFP drivers must be disabled.  I do not know if exclusions work to fix the issue with the latest versions of KIS.

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This is indeed a WFP collision between Malwarebytes and Kaspersky software. We have reproduced this behaviour internally.

Please see https://support.malwarebytes.com/hc/en-us/articles/360051090194-Issues-running-other-security-applications-and-Malwarebytes-for-Windows.

As you've found, exclusions are not sufficient for working around this problem. You will need to disable Web Protection in Malwarebytes or uninstall Kaspersky Total Security/disable the web protection-related functionality in Kaspersky Total Security.

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By the way, @gicahagi, if you aren't doing so already, I'd highly recommend installing Malwarebytes Browser Guard, especially if you end up deciding to keep Web Protection disabled, as Malwarebytes Browser Guard blocks much of the same malicious content as Web Protection in Malwarebytes in addition to also blocking many ads, trackers and also includes advanced behavior based blocking for tech support scam sites.  It only shields your browser, unlike Web Protection which shields your entire system, however the web browser is obviously the highest risk web-facing application in most cases so it gives back a large part of what is lost when Web Protection is disabled and it shouldn't conflict with Kaspersky either.

Please refer to the links below for more info and downloads:

Malwarebytes Browser Guard homepage
Chrome (Chromium browser compatible) version
Firefox version

Edited by exile360
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9 hours ago, LiquidTension said:

This is indeed a WFP collision between Malwarebytes and Kaspersky software. We have reproduced this behaviour internally.

Please see https://support.malwarebytes.com/hc/en-us/articles/360051090194-Issues-running-other-security-applications-and-Malwarebytes-for-Windows.

As you've found, exclusions are not sufficient for working around this problem. You will need to disable Web Protection in Malwarebytes or uninstall Kaspersky Total Security/disable the web protection-related functionality in Kaspersky Total Security.

I ran into this issue with the WFP conflicting between Avast and Malwarebytes which caused a BSOD about a month ago.

AdvancedSetup was a big help finding the culprit on this compatibility issue and letting me know what my options were going forward.


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  • 4 weeks later...
  • Root Admin

I'm sorry but we will not be working on trying to make Malwarebytes compatible with Kaspersky. Our product is a full antivirus replacement and is no longer just an addition to an antivirus.


You will need to choose one and probably remove the other one

Thank you


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Why you don't ask Kaspersky to make it compatible with malwarebytes? Same thing for them i guess. For more then 20 year i know that installing more then one AV was a bad idea. It's sucking up resources on your pc that you could use otherwise. It also gives you a false feeling of protection. Not to mention the BSOD and all other kind of problems because of this. Two AV are always fighting each other for rights on your system. They even fight each other giving you errors all the time. So no Malwarebytes should NOT make it compatible with Kaspersky. Kaspersky itself could do the same thing, but they just ignoring it. Malwarebytes is a good FULL AV like many other, you do not need another one. Just my two cents...

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